Ernest Ongaro & Sons Inc Dba Ongaro & Sons
Ernest Ongaro & Sons Inc Dba Ongaro & Sons is an active, licensed contractor operating in Petaluma, CA. Operating under a California contractor license established in 1963. They hold 11 license classifications including C-4 Boiler, Hot-Water Heating and Steam Fitting Contractor, C-10 Electrical Contractor, and 9 others. They currently maintain an active contractor bond and workers' compensation insurance. No disciplinary actions have been recorded against this license.
License Information
- License Number
- 215233
- Status
- Active
- Classification(s)
- C-4: Boiler, Hot-Water Heating and Steam Fitting Contractor, C-10: Electrical Contractor, C-16: Fire Protection Contractor, C-20: Warm-Air Heating, Ventilating and Air-Conditioning (HVAC) Contractor, C-34: Pipeline Contractor, C-36: Plumbing Contractor, C-39: Roofing Contractor, C-42: Sanitation System Contractor, C-43: Sheet Metal Contractor, C-60: Welding Contractor, D21: Machinery and Pumps
- Tenure
- Licensed since 1963 (63 years)
- Issue Date
- February 13, 1963
- Expiration Date
- January 31, 2028
- Disciplinary Record
- No Disciplinary Actions
Bond & Insurance
- Contractor Bond
- Bonded ($25000) – MERCHANTS BONDING COMPANY (MUTUAL)
- Workers’ Compensation
- Workers' Compensation Insurance – CAROLINA CASUALTY INSURANCE COMPANY
A contractor’s bond protects consumers up to the bond amount if the contractor fails to fulfill contractual obligations or violates CSLB regulations.
Workers’ compensation insurance protects homeowners from liability if a contractor’s employee is injured on the job site.
Location
- Address
- 719 SOUTHPOINT BLVD
- City
- Petaluma, CA
- ZIP Code
- 94954
- Phone
- (707) 579-3511
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About These License Types
C-4: Boiler, Hot-Water Heating and Steam Fitting Contractor
Installs, services, and repairs power boiler installations, hot-water heating systems and steam fitting, including fire-tube and water-tube boilers, piping, fittings, valves, gauges, pumps, radiators, fuel oil tanks, chimneys, flues, and associated solar heating equipment.
Not authorized: Does not include warm-air heating or air conditioning systems (see C-20).
C-10: Electrical Contractor
Places, installs, erects, or connects electrical wires, fixtures, appliances, apparatus, raceways, conduits, solar photovoltaic cells, or any part thereof which generate, transmit, transform, or utilize electrical energy.
Not authorized: Electricians working under a C-10 must be certified per CA Labor Code.
C-16: Fire Protection Contractor
Lays out, fabricates, and installs all types of fire protection systems including all associated equipment.
Not authorized: Does not include electrical alarm systems.
C-20: Warm-Air Heating, Ventilating and Air-Conditioning (HVAC) Contractor
Fabricates, installs, maintains, services, and repairs warm-air heating systems and water heating heat pumps, ventilating systems, air-conditioning systems, and the ducts, registers, flues, humidity and thermostatic controls and air filters in connection with these systems. Includes solar-powered HVAC systems.
Not authorized: Does not include boiler or steam heating (see C-4) or refrigeration below 50F (see C-38).
C-34: Pipeline Contractor
Fabricates and installs pipelines for conveyance of fluids such as water, gas, or petroleum, including protective coatings and the trenching, boring, shoring, backfilling, compacting, paving, and surfacing to complete installation.
C-36: Plumbing Contractor
Provides means for a supply of safe water and proper disposal of fluid waste, including piping, storage tanks, venting, gas appliances and connections, water and gas piping, water heating equipment including solar, and health and safety devices such as backflow preventers and gas earthquake valves.
Not authorized: Does not include forced warm-air units (see C-20).
C-39: Roofing Contractor
Installs products and repairs surfaces that seal, waterproof, and weatherproof structures using asphaltum, pitch, tar, felt, glass fabric, urethane foam, metal roofing systems, shakes, shingles, roof tile, slate, and other roofing materials.
C-42: Sanitation System Contractor
Fabricates and installs cesspools, septic tanks, storm drains, and other sewage disposal and drain structures, including cast iron, steel, concrete, and vitreous pipe.
C-43: Sheet Metal Contractor
Selects, cuts, shapes, fabricates, and installs sheet metal including cornices, flashings, gutters, leaders, pans, kitchen equipment, duct work with insulation, patented chimneys, metal flues, and metal roofing systems.
C-60: Welding Contractor
Causes metal to become permanently attached, joined, and fabricated by the use of gases and electrical energy creating sufficient heat.
D21: Machinery and Pumps
Installs, maintains, and repairs machinery and pumps.
Licensing Resources
Workers' comp requirements for California contractors
Deposit and payment rules for California contracts
Home improvement contract requirements
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License data sourced from the California Contractors State License Board. Last data update: April 05, 2026.